. . "Then remove them with a plastic slotted spoon, keep metal away from the mixture, especially Aluminum; as it interacts with the acids in the lemon oils. 1 Liter of 190 Proof Everclear to the peels of 15 Lemons, with 1Liter of water with 5 1/2 cups of cane sugar yields a 90 Proof Limoncello." . .